1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.kernel.servlet;
24  
25  import java.util.ArrayList;
26  import java.util.Iterator;
27  import java.util.List;
28  
29  import javax.servlet.http.HttpSessionEvent;
30  import javax.servlet.http.HttpSessionListener;
31  
32  /**
33   * <a href="PortletSessionListenerManager.java.html"><b><i>View Source</i></b>
34   * </a>
35   *
36   * <p>
37   * See http://support.liferay.com/browse/LEP-2299.
38   * </p>
39   *
40   * @author Olaf Fricke
41   * @author Brian Wing Shun Chan
42   */
43  public class PortletSessionListenerManager implements HttpSessionListener {
44  
45      public static void addListener(HttpSessionListener listener) {
46          _listeners.add(listener);
47      }
48  
49      public static void removeListener(HttpSessionListener listener) {
50          _listeners.remove(listener);
51      }
52  
53      public void sessionCreated(HttpSessionEvent event) {
54          Thread currentThread = Thread.currentThread();
55  
56          ClassLoader contextClassLoader = currentThread.getContextClassLoader();
57  
58          try {
59              Iterator<HttpSessionListener> itr = _listeners.iterator();
60  
61              while (itr.hasNext()) {
62                  HttpSessionListener listener = itr.next();
63  
64                  ClassLoader listenerClassLoader =
65                      listener.getClass().getClassLoader();
66  
67                  currentThread.setContextClassLoader(listenerClassLoader);
68  
69                  listener.sessionCreated(event);
70              }
71          }
72          finally {
73              currentThread.setContextClassLoader(contextClassLoader);
74          }
75      }
76  
77      public void sessionDestroyed(HttpSessionEvent event) {
78          Iterator<HttpSessionListener> itr = _listeners.iterator();
79  
80          while (itr.hasNext()) {
81              HttpSessionListener listener = itr.next();
82  
83              listener.sessionDestroyed(event);
84          }
85      }
86  
87      private static List<HttpSessionListener> _listeners =
88          new ArrayList<HttpSessionListener>();
89  
90  }